/**********************************************************************\

 Copyright 2012 Diggory Blake

 This file is part of klip-engine

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.

\**********************************************************************/
#pragma once

#include <unordered_set>

class kWatcher;
class kActor;

#include "kbase.h"
#include "kcommon.h"
#include "kperformance.h"

class kWatcher : public kBase {
private:
	std::unordered_set<kActor*> _actors;
protected:
	virtual void onActorAdded(kActor* actor);
	virtual void onActorRemoved(kActor* actor);
public:
	inline const std::unordered_set<kActor*>& getActors() {
		return _actors;
	}
	template<typename T> kCollection<T> getActors() {
		PERF_QUERY;
		return kCollection<T>(_actors.begin(), _actors.end(), _actors.size());
	}
	void addActor(kActor* actor);
	void removeActor(kActor* actor);
	void clearActors();
};
